1. Copyediting: Copyediting is the process of checking for and correcting errors in grammar, spelling, punctuation, and style. Copyeditors also check for consistency in the use of language and formatting throughout a document.
2. Proofreading: Proofreading is the process of checking for and correcting any remaining errors in a document that may have been missed during copyediting. Proofreaders also check for errors in layout and formatting.